Table 1.

SC characteristics (start time t_s, peak time t_p, ascent time T_a, descent time T_d, length T_cy and solar maximum S_max) for SCs 1–23. The model parameters T_pre and the Shannon entropy obtained using the histogram technique along with bin widths derived from Scott’s and Knuth’s methods for w_s = 9 are presented for SCs 10–23. T_d (computed from Eq. (6)) and the absolute deviation (obtained from observed values of T_d) are presented in the last two columns. The predicted values are shown in bold. The epochs and time durations are in units of years.

Cy. no.	SC characteristics							Kunth’s method		Scott’s method		Error in prediction
	ts	tp	Ta	Td	Tcy	Smax	Tpre	E	Wk	E	Wk	[Td]cal
1	1755.13	1761.46	6.33	4.92	11.25	86.50		–	–	–	–	–	–
2	1766.38	1769.71	3.33	5.75	9.08	115.80		–	–	–	–	–	–
3	1775.46	1778.38	2.92	6.33	9.25	158.50		–	–	–	–	–	–
4	1784.71	1788.13	3.42	10.17	13.58	141.20	8.33	–	–	5.75	–	–	–
5	1798.29	1805.13	6.83	5.00	11.83	49.20	12.58	–	–	4.88	–	–	–
6	1810.13	1816.38	6.25	6.83	13.08	48.70	12.58	–	–	5.17	–	–	–
7	1823.21	1829.88	6.67	4.00	10.67	71.50	16.83	–	–	4.83	–	–	–
8	1833.88	1837.21	3.33	6.33	9.67	146.90	8.33	–	–	5.78	–	–	–
9	1843.54	1848.13	4.58	7.83	12.42	131.90	11.42	–	–	5.55	–	–	–
10	1855.96	1860.13	4.17	7.08	11.25	98.00	8.17	5.69	2.26	5.71	2.94	–	–
11	1867.21	1870.63	3.42	8.33	11.75	140.30	9.75	5.63	1.41	5.70	3.00	–	–
12	1878.96	1883.96	5.00	6.17	11.17	74.60	12.83	5.14	2.19	5.17	2.03	6.32	0.15
13	1890.13	1894.04	3.92	8.00	11.92	87.90	11.00	5.29	2.15	5.30	2.24	7.86	0.14
14	1902.04	1906.13	4.08	7.33	11.42	64.20	12.42	5.08	1.13	5.13	2.14	6.58	0.75
15	1913.46	1917.63	4.17	5.92	10.08	105.40	10.33	5.46	2.96	5.47	2.68	5.79	0.12
16	1923.54	1928.29	4.75	5.42	10.17	78.10	12.75	5.31	3.35	5.32	2.32	5.86	0.45
17	1933.71	1937.29	3.58	6.83	10.42	119.20	10.92	5.47	4.02	5.46	2.54	6.55	0.28
18	1944.13	1947.38	3.25	6.92	10.17	151.80	9.17	5.63	3.03	5.64	2.85	7.76	0.84
19	1954.29	1958.21	3.92	6.58	10.50	201.30	9.33	5.72	4.01	5.71	2.99	7.09	0.51
20	1964.79	1968.88	4.08	7.33	11.42	110.60	10.92	5.42	3.97	5.41	2.29	6.77	0.56
21	1976.21	1979.96	3.75	6.75	10.50	164.50	10.67	5.59	4.10	5.59	2.74	7.56	0.81
22	1986.71	1989.54	2.83	6.83	9.67	158.50	9.42	5.62	4.39	5.62	2.83	6.66	0.17
23	1996.38	2000.29	3.92	8.58	12.50	120.80	11.25	5.27	3.74	5.26	2.09	7.85	0.73
24	2008.88	–	–	–	–	–	–	–	–	–	–	6.84	–
25	–	–	–	–	–	–	–	–	–	–	–	5.77	–